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UNTTED sTATEs PATENT oEEioE.

JOEL R. BASSETT, OF CINCINNATI, OHIO, ASSIGNOR TO JAS. B. WILLIAMS.

PUMP-VALVE.

Specification of Letters Patent No.

Aing-valve, are combined in one mechanism.

2d, to provide for the discharge openings of a double-acting pump,-a slide valve, common to both; moving simultaneously with and actuated by the supply valves.

In the accompanying drawings Figure l is a perspective view, the valve box being separated by a vertical section. Fig. 2 is a top view of the slide valve seat. Fig. 3 is a vertical section showing the valve movements.

(a) is the cylinder; (Z2), the side pipe; (c), `the water passages, communicating in the usual way with the supply valve chambers (d CZ), one directly with the bottom of the cylinder, and the other through the side pipe with the top of the cylinder.

(e, f, g, h) is a puppet valve serving the purpose of ak check valve, and consisting of a valve disk (e), having ya hollow cylindrical stem or shank (f), with a leather gasket (g), secured in its top by a screw cap (IL), so as to make between the valve and its cylindrical chamber (i), a perfectly air tight joint; but which shall also permit the free play of the valve up and down within the chamber. The space in the chamber above the valve, is intended to inclose a body of air of the ordinary atmospheric density, when the valve is on its seat. At the center of the disk of this puppet-valve, is a small aperture (j), occupied by a ball-valve (is). The sides of the chamber also, at their lower part, are pierced by small apertures (Z), to afford egress to the water. The object of this device, is to set in motion an ascending current of water, that by its impetus shall expedite the opening of the check Valve. As soon as the check valve is open, it acts forthwith as a means of modulating any irregularities in the current; and counteracts any sudden jar or intermittent action, the valve (e, f, g, 7L), acting as a piston to the volume of air in the chamber, so as to transmit its resilient influence to the water, without per- 1o,e1s, dated Deeember 13, 1853.

mitting any escape of the air or access of water to the pneumatic chamber. l (m, m) are the two supply-valves, and (n, n) are their openings. These valves are of the kind commonly called clack valves, and have their center of vibration near to thecentral partition (0), which separates fro-m each other the two supply-valve chambers (d, cl), the leather'hinge on which these valves vibrate, also serving as a gasket. The roofsof the chambers (el, CZ), form collectively a semicylindrical seat for a slide valve (Z9, 1) which being slid to and fro upon the seat, brings'its opening (g) alternately over one of the otherdischarge openings (r, 7^) in the top of the supply chamber; Y

The motion of this slide valve is obtained in a very Vpeculiar way, being derived from either supply valve alternately, in manner following.

(s, s) are two of fourprongs, which pro jecting from the 'under `side of the slidevalve, through slots (t) into the supplyvalve chambers, are there either made fast to, or simply impinge against the top of the supply-valves; so that each valve as it rises, impe'ls the slide valve in the direction to close its respective discharge opening, and to open the other: this communication of motion is readily effected, inasmuch as there is only the inertia of the slide valve to overcome; kthe lower or clack-valve moving concentric or nearly so, with the path ofthe slide valve.

The operation of my pump is as follows: The piston being at theJ topof the cylinder, and the vlatter being already primed with water, and all the valves resting on their seats, let now the piston be depressed; a tendency to the vacuum will `be thereby created in the upper part of the cylinder and consequently the water above the supply valve connecting therewith (the open one in the drawing) rushing to supply the void, removes the hydrostatic pressure from the top of the said valve, which, opening, and pressing upward against the prongs of the slide valve, the latter is thereby pushed over to the reverse position,so as to close the discharge port or aperture immediately above the now open supply valve and to open the other po-rt. At the same time the upward draft of water, raises the small starting valve (lo) and an upward current being thereby established its impetus and friction against the check-valve, instantly effects its elevation, and it continues to rise, until the resilience of the compressed body of air in the pneumatic cushion above the check valve, counterbalances the hydraulic force. The check valve being once raised, continues elevated so long as the piston is in action, merely oscillating gently up and down, as the pressure varies, so as to tend to equalize the action of the Water and pre# vent any sudden jars. IVhile the above movements have taken place, the contents of the cylinder below the piston, have been discharged through the open port on the other side. On the ascent of the piston, of course all these actions are reversed, except that the check valve instead of closing, merely dips a little Way into the supply chamber at each change of stroke.

The utility of the check valve is twofold. It insures the priming of the pump by keeping it full of Water, in case the other valves,-from their much more rapid Wearbecome lealyyand it also isolates the air cushion so as to prevent its diminishment by contact With the flowing Water. The advantages of the cylindrical slide valve, although of a simply economical and practical character, are of material importance in so staple an article as a pump. Besides sharing incommon Wit-h all constructed slide valves--the advantages of permanency, and

ease of operation, it also presents facilities for its Wearing surfaces being finished by the turning lat-he. This cylindrical form is necessitated by my peculiar method of Work ing the discharge valve by means of each supply valve alternately, and requiring for the easy Working of the former, that it should be as nearly as possible concentric `With the axes of vibration of the latter.

tion of the supply-valves shallbe communi V cated to the discharge-valve as herein eX- plained.

In testimony whereof, I have hereunto set my hand before tvvo subscribing Witnesses.

J. R. BASSETT.

Witnesses:

GEO H. KNIGHT, F. H. RWEKAMP. 

